Our stay could be summed up as 'Meh'. It definitely is not a 'hotel', but an apartment turned into an airbnb.
The pictures are deceiving. My boyfriend and I had the Danubio room in blue. It had no windows, except a fire escape that looks out into an ally that is surrounded by 4 walls and gets no light. It was also extremally small, and not as nice as it looked in the pictures.
My biggest issue was the mattress, as it is two twin beds pushed together, and they separate while you sleep. It was extremally uncomfortable, and it was impossible to sleep through the night. I asked if it was possible to move to another room, and they said that all the beds are the same.
It is also on the second floor, and the elevator does not work so you have to walk your bags up the stairs. There is never anyone at the front desk, which isn't a huge issue but it seems very hands off.
The location is what it has going for it. It was right next to Piazza Navona, and all the main attractions are within a 20 minute walk with a bunch of restaurants close by. Overall it was very clean, and quiet. The woman who I interacted with before and during my trip, was very helpful and attentive.